Golf club shaft

A golf club shaft having a weight not less than 30 g nor more than 60 g;

• said golf club shaft comprising a bias layer composed of a prepreg whose reinforcing fibers have an orientation angle of not less than ±10° nor more than 80° to an axis of said golf club shaft;
• and a plurality of straight layers each composed of a prepreg whose reinforcing fibers have an orientation angle within 0°±10° to said axis of said golf club shaft,
• wherein at least one partial reinforcing hoop layer whose reinforcing fibers have an orientation angle of within 90°±10° to said axis of said golf club shaft is disposed in only an important reinforcing region in a range from a point P spaced at 15% of a full length of said golf club shaft from a grip-side butt thereof to a point Q spaced at 45% of said full length of said golf club shaft from said grip-side butt thereof,
• and wherein said bias layer, one of said plurality of straight layers, and a full-length hoop layer are disposed over a full length of said golf club shaft;
• and said full-length straight layer is disposed as an outermost full-length layer;
• and said partial reinforcing hoop layer is disposed adjacently to said full-length straight layer with said partial reinforcing hoop layer disposed inward from an inner periphery of said full-length straight layer.